static void TftpSend (void) {
volatile unsigned char * pkt;
volatile unsigned char * xp;
int len = 0;
/*
* We will always be sending some sort of packet, so
* cobble together the packet headers now.
*/
pkt = NetTxPacket + ETHER_HDR_SIZE + IP_HDR_SIZE;
switch (TftpState) {
case STATE_RRQ:
xp = pkt;
*((unsigned short *) pkt) = TFTP_RRQ;
pkt += sizeof(unsigned short);
strcpy ((char *) pkt, tftp_filename);
pkt += strlen(tftp_filename) + 1;
strcpy ((char *) pkt, "octet");
pkt += 5 /*strlen("octet")*/ + 1;
len = pkt - xp;
break;
case STATE_DATA:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ACK;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = TftpBlock;
pkt += sizeof(unsigned short);
len = pkt - xp;
break;
case STATE_TOO_LARGE:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ERROR;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = 3;
pkt += sizeof(unsigned short);
strcpy ((char *)pkt, "File too large");
pkt += 14 /*strlen("File too large")*/ + 1;
len = pkt - xp;
break;
case STATE_BAD_MAGIC:
xp = pkt;
*((unsigned short *) pkt) = TFTP_ERROR;
pkt += sizeof(unsigned short);
*((unsigned short *) pkt) = 2;
pkt += sizeof(unsigned short);
strcpy ((char *) pkt, "File has bad magic");
pkt += 18 /*strlen("File has bad magic")*/ + 1;
len = pkt - xp;
break;
}
NetSetEther(NetTxPacket, NetServerEther, PROT_IP);
NetSetIP(NetTxPacket + ETHER_HDR_SIZE, NetServerIP, TftpServerPort, TftpOurPort, len);
NetSendPacket(NetTxPacket, ETHER_HDR_SIZE + IP_HDR_SIZE + len);
}
bool PhotoQuery(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
int min, max;
min = NetGetNumberData(p, "min");
max = NetGetNumberData(p, "max");
PhotoPost *plist;
NetPacket *pkt;
int len;
pkt = NetCreatePacket();
plist = QueryPhotoList(DB(d),NetGetStringData(p, "id")
, min, max, &len);
if(plist == NULL){
pkt->header.type = PHOTO_QUERY_FAILED;
NetAddStringData(pkt, "reason", REASON_MEMORY_ERROR);
goto CleanUp;
}
else
pkt->header.type = PHOTO_INFO;
NetAddNumberData(pkt, "count", len);
for(int i=0;i<len;i++){
char msg[8];
printf("%s %d\n", plist[i].comment, plist[i].lat);
sprintf(msg,"i%d", i+1);
NetAddStringData(pkt, msg, plist[i].id);
sprintf(msg,"c%d", i+1);
NetAddStringData(pkt, msg, plist[i].comment);
sprintf(msg,"p%d", i+1);
NetAddStringData(pkt, msg, plist[i].photo);
sprintf(msg,"pi%d", i+1);
NetAddNumberData(pkt, msg, plist[i].photo_id);
sprintf(msg,"t%d", i+1);
NetAddNumberData(pkt, msg, plist[i].time);
sprintf(msg,"lt%d", i+1);
NetAddNumberData(pkt, msg, plist[i].lat);
sprintf(msg,"ln%d", i+1);
NetAddNumberData(pkt, msg, plist[i].lon);
sprintf(msg,"l%d", i+1);
NetAddNumberData(pkt, msg, plist[i].like);
}
CleanUp:
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
free(plist);
return ret;
}
void
RarpRequest (void)
{
int i;
volatile uchar *pkt;
ARP_t * rarp;
printf("RARP broadcast %d\n", ++RarpTry);
pkt = NetTxPacket;
pkt += NetSetEther(pkt, NetBcastAddr, PROT_RARP);
rarp = (ARP_t *)pkt;
rarp->ar_hrd = htons (ARP_ETHER);
rarp->ar_pro = htons (PROT_IP);
rarp->ar_hln = 6;
rarp->ar_pln = 4;
rarp->ar_op = htons (RARPOP_REQUEST);
memcpy (&rarp->ar_data[0], NetOurEther, 6); /* source ET addr */
memcpy (&rarp->ar_data[6], &NetOurIP, 4); /* source IP addr */
memcpy (&rarp->ar_data[10], NetOurEther, 6); /* dest ET addr = source ET addr ??*/
/* dest. IP addr set to broadcast */
for (i = 0; i <= 3; i++) {
rarp->ar_data[16 + i] = 0xff;
}
NetSendPacket(NetTxPacket, (pkt - NetTxPacket) + ARP_HDR_SIZE);
NetSetTimeout(TIMEOUT, RarpTimeout);
NetSetHandler(RarpHandler);
}
bool PhotoPush(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
PhotoPost post;
post.lat = NetGetNumberData(p, "lat");
post.lon = NetGetNumberData(p, "lon");
SET(post.photo, NetGetStringData(p, "photo"));
SET(post.comment, NetGetStringData(p, "comment"));
ret = PushPhoto(DB(d),d.handle->user->id, &post);
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret){
pkt->header.type = PHOTO_OK;
NetAddNumberData(pkt, "photo_id", post.photo_id);
}
else{
pkt->header.type = PHOTO_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
bool PhotoCommentPush(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
PhotoComment com;
com.photo_id = NetGetNumberData(p, "photo_id");
SET(com.comment, NetGetStringData(p, "comment"));
ret = PushPhotoComment(DB(d),d.handle->user->id, &com);
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret){
pkt->header.type = PHOTO_COMMENT_OK;
NetAddNumberData(pkt, "comment_id", com.photo_id);
}
else{
pkt->header.type = PHOTO_COMMENT_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
bool PhotoCommentDelete(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
ret = DeletePhotoComment(
DB(d),
d.handle->user->id,
NetGetNumberData(p, "comment_id"));
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret){
pkt->header.type = PHOTO_COMMENT_OK;
}
else{
pkt->header.type = PHOTO_COMMENT_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
{
struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
IPaddr_t src_ip;
int eth_hdr_size;
switch (icmph->type) {
case ICMP_ECHO_REPLY:
src_ip = NetReadIP((void *)&ip->ip_src);
if (src_ip == NetPingIP)
net_set_state(NETLOOP_SUCCESS);
return;
case ICMP_ECHO_REQUEST:
eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
debug_cond(DEBUG_DEV_PKT, "Got ICMP ECHO REQUEST, return "
"%d bytes\n", eth_hdr_size + len);
ip->ip_sum = 0;
ip->ip_off = 0;
NetCopyIP((void *)&ip->ip_dst, &ip->ip_src);
NetCopyIP((void *)&ip->ip_src, &NetOurIP);
ip->ip_sum = ~NetCksum((uchar *)ip,
IP_HDR_SIZE >> 1);
icmph->type = ICMP_ECHO_REPLY;
icmph->checksum = 0;
icmph->checksum = ~NetCksum((uchar *)icmph,
(len - IP_HDR_SIZE) >> 1);
NetSendPacket((uchar *)et, eth_hdr_size + len);
return;
/* default:
return;*/
}
}
void arp_raw_request(IPaddr_t sourceIP, const uchar *targetEther,
IPaddr_t targetIP)
{
uchar *pkt;
struct arp_hdr *arp;
int eth_hdr_size;
debug_cond(DEBUG_DEV_PKT, "ARP broadcast %d\n", NetArpWaitTry);
pkt = NetArpTxPacket;
eth_hdr_size = NetSetEther(pkt, NetBcastAddr, PROT_ARP);
pkt += eth_hdr_size;
arp = (struct arp_hdr *) pkt;
arp->ar_hrd = htons(ARP_ETHER);
arp->ar_pro = htons(PROT_IP);
arp->ar_hln = ARP_HLEN;
arp->ar_pln = ARP_PLEN;
arp->ar_op = htons(ARPOP_REQUEST);
memcpy(&arp->ar_sha, NetOurEther, ARP_HLEN); /* source ET addr */
NetWriteIP(&arp->ar_spa, sourceIP); /* source IP addr */
memcpy(&arp->ar_tha, targetEther, ARP_HLEN); /* target ET addr */
NetWriteIP(&arp->ar_tpa, targetIP); /* target IP addr */
NetSendPacket(NetArpTxPacket, eth_hdr_size + ARP_HDR_SIZE);
}
bool FriendQueryCount(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
int ret = true;
ret = QueryFriendCount(DB(d), NetGetStringData(p, "id"));
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret == -1){
pkt->header.type = FRIEND_QUERY_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
else{
pkt->header.type = FRIEND_INFO_COUNT;
NetAddNumberData(pkt, "count", ret);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
bool FriendFriend(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
ret = Friend(DB(d),
d.handle->user->id,
NetGetStringData(p, "id"));
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret == true){
pkt->header.type = FRIEND_ADD_OK;
}
else{
pkt->header.type = FRIEND_ADD_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
int NetSendUDPPacket(uchar *ether, IPaddr_t dest, int dport, int sport,
int payload_len)
{
uchar *pkt;
int eth_hdr_size;
int pkt_hdr_size;
/* make sure the NetTxPacket is initialized (NetInit() was called) */
assert(NetTxPacket != NULL);
if (NetTxPacket == NULL)
return -1;
/* convert to new style broadcast */
if (dest == 0)
dest = 0xFFFFFFFF;
/* if broadcast, make the ether address a broadcast and don't do ARP */
if (dest == 0xFFFFFFFF)
ether = NetBcastAddr;
pkt = (uchar *)NetTxPacket;
eth_hdr_size = NetSetEther(pkt, ether, PROT_IP);
pkt += eth_hdr_size;
net_set_udp_header(pkt, dest, dport, sport, payload_len);
pkt_hdr_size = eth_hdr_size + IP_UDP_HDR_SIZE;
/* if MAC address was not discovered yet, do an ARP request */
if (memcmp(ether, NetEtherNullAddr, 6) == 0) {
debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &dest);
/* save the ip and eth addr for the packet to send after arp */
NetArpWaitPacketIP = dest;
NetArpWaitPacketMAC = ether;
/* size of the waiting packet */
NetArpWaitTxPacketSize = pkt_hdr_size + payload_len;
/* and do the ARP request */
NetArpWaitTry = 1;
NetArpWaitTimerStart = get_timer(0);
ArpRequest();
return 1; /* waiting */
} else {
debug_cond(DEBUG_DEV_PKT, "sending UDP to %pI4/%pM\n",
&dest, ether);
NetSendPacket(NetTxPacket, pkt_hdr_size + payload_len);
return 0; /* transmitted */
}
}
bool LocationQuery(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
int min, max;
Location *plist;
NetPacket *pkt;
int len;
pkt = NetCreatePacket();
printf("ASDF");
plist = QueryLocation(DB(d)
, &len);
if(plist == NULL){
pkt->header.type = LOCATION_QUERY_FAILED;
NetAddStringData(pkt, "reason", REASON_MEMORY_ERROR);
goto CleanUp;
}
else
pkt->header.type = LOCATION_INFO;
NetAddNumberData(pkt, "count", len);
for(int i=0;i<len;i++){
char msg[8];
sprintf(msg,"lt%d", i+1);
NetAddNumberData(pkt, msg, plist[i].lat);
sprintf(msg,"ln%d", i+1);
NetAddNumberData(pkt, msg, plist[i].lon);
sprintf(msg,"i%d", i+1);
NetAddStringData(pkt, msg, plist[i].id);
}
CleanUp:
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
free(plist);
return ret;
}
bool FriendQueryFriend(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
ret = IsFriended(DB(d),
NetGetStringData(p, "id1"),
NetGetStringData(p, "id2"));
NetPacket *pkt;
pkt = NetCreatePacket();
pkt->header.type = FRIEND_INFO_FRIEND;
NetAddNumberData(pkt, "result", ret);
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
bool PhotoLike(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret;
ret = LikePhoto(DB(d), d.handle->user->id, NetGetNumberData(p, "photo_id"));
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret == true){
pkt->header.type = PHOTO_OK;
}
else{
pkt->header.type = PHOTO_FAILED;
NetAddStringData(pkt, "reason", REASON_UNKNOWN);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
bool FriendQueryList(PacketHandlerData d){
NetPacket *p;
p = d.pkt;
bool ret = true;
FriendList list;
ret = QueryFriendList(DB(d),
NetGetStringData(p, "id"),
&list,
NetGetNumberData(p, "min"),
NetGetNumberData(p, "max"));
NetPacket *pkt;
pkt = NetCreatePacket();
if(ret == false){
pkt->header.type = FRIEND_QUERY_FAILED;
}
else{
pkt->header.type = FRIEND_INFO_LIST;
NetAddNumberData(pkt, "count", list.count);
for(int i=0;i<list.count;i++){
char m[8];
sprintf(m, "i%d", i+1);
NetAddStringData(pkt, m, list.id + i*16);
}
free(list.id);
}
NetSendPacket(d.handle,d.io,pkt);
NetDisposePacket(pkt, true);
return ret;
}
void ArpReceive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
{
struct arp_hdr *arp;
IPaddr_t reply_ip_addr;
uchar *pkt;
int eth_hdr_size;
/*
* We have to deal with two types of ARP packets:
* - REQUEST packets will be answered by sending our
* IP address - if we know it.
* - REPLY packates are expected only after we asked
* for the TFTP server's or the gateway's ethernet
* address; so if we receive such a packet, we set
* the server ethernet address
*/
debug_cond(DEBUG_NET_PKT, "Got ARP\n");
arp = (struct arp_hdr *)ip;
if (len < ARP_HDR_SIZE) {
printf("bad length %d < %d\n", len, ARP_HDR_SIZE);
return;
}
if (ntohs(arp->ar_hrd) != ARP_ETHER)
return;
if (ntohs(arp->ar_pro) != PROT_IP)
return;
if (arp->ar_hln != ARP_HLEN)
return;
if (arp->ar_pln != ARP_PLEN)
return;
if (NetOurIP == 0)
return;
if (NetReadIP(&arp->ar_tpa) != NetOurIP)
return;
switch (ntohs(arp->ar_op)) {
case ARPOP_REQUEST:
/* reply with our IP address */
debug_cond(DEBUG_DEV_PKT, "Got ARP REQUEST, return our IP\n");
pkt = (uchar *)et;
eth_hdr_size = net_update_ether(et, et->et_src, PROT_ARP);
pkt += eth_hdr_size;
arp->ar_op = htons(ARPOP_REPLY);
memcpy(&arp->ar_tha, &arp->ar_sha, ARP_HLEN);
NetCopyIP(&arp->ar_tpa, &arp->ar_spa);
memcpy(&arp->ar_sha, NetOurEther, ARP_HLEN);
NetCopyIP(&arp->ar_spa, &NetOurIP);
#ifdef CONFIG_CMD_LINK_LOCAL
/*
* Work-around for brain-damaged Cisco equipment with
* arp-proxy enabled.
*
* If the requesting IP is not on our subnet, wait 5ms to
* reply to ARP request so that our reply will overwrite
* the arp-proxy's instead of the other way around.
*/
if ((NetReadIP(&arp->ar_tpa) & NetOurSubnetMask) !=
(NetReadIP(&arp->ar_spa) & NetOurSubnetMask))
udelay(5000);
#endif
NetSendPacket((uchar *)et, eth_hdr_size + ARP_HDR_SIZE);
return;
case ARPOP_REPLY: /* arp reply */
/* are we waiting for a reply */
if (!NetArpWaitPacketIP)
break;
#ifdef CONFIG_KEEP_SERVERADDR
if (NetServerIP == NetArpWaitPacketIP) {
char buf[20];
sprintf(buf, "%pM", &arp->ar_sha);
setenv("serveraddr", buf);
}
#endif
reply_ip_addr = NetReadIP(&arp->ar_spa);
/* matched waiting packet's address */
if (reply_ip_addr == NetArpWaitReplyIP) {
debug_cond(DEBUG_DEV_PKT,
"Got ARP REPLY, set eth addr (%pM)\n",
arp->ar_data);
/* save address for later use */
if (NetArpWaitPacketMAC != NULL)
memcpy(NetArpWaitPacketMAC,
&arp->ar_sha, ARP_HLEN);
net_get_arp_handler()((uchar *)arp, 0, reply_ip_addr,
0, len);
/* set the mac address in the waiting packet's header
and transmit it */
memcpy(((struct ethernet_hdr *)NetTxPacket)->et_dest,
&arp->ar_sha, ARP_HLEN);
NetSendPacket(NetTxPacket, NetArpWaitTxPacketSize);
/* no arp request pending now */
NetArpWaitPacketIP = 0;
NetArpWaitTxPacketSize = 0;
NetArpWaitPacketMAC = NULL;
}
return;
default:
debug("Unexpected ARP opcode 0x%x\n",
ntohs(arp->ar_op));
return;
}
}